We have Ellipse 5.2.3.7 wk3 and I am using Visual Studio 2005 (C# Language). This is how I am creating a work order using the Mincom Connector.

public bool createDriveUpWO(string WoDesc,
                           string OriginatorID,
                           string WoType,
                           string MaintType,
                           string componentCode,
                           string EquipNo,
                           string VehicleNo,
                           string WorkGroup,
                           string JobCodeX4,
                           string JobCodeX6,
                           string planStartDate)
{
   MIMSX.MIMSBlock createBlock;
   MIMSX.MIMSReply createReply;
   MIMSX.MIMSRequest createRequest;
   MIMSX.MIMSInstance createInstance;

   try
   {
     #region Variables   

     #region Account Code   
     string accountCode = "9010" + VehicleNo.Substring(0,1) + "016100000";
     #endregion

     #endregion

     createBlock = mimsServer.Blocks.New("createWoBlock");
                createRequest = createBlock.Requests.New("createWoRequest");
                
     createRequest.AddFieldNameValue(MIMSX.MIMSX_REQUEST_FLAGS.MIMSX_FLAG_SERVICE, "WORKORDER.Create");

      createInstance = createRequest.Instances.New("createWoInstance");

       createInstance.AddFieldNameValue("DstrctCode", "DIS1");
       createInstance.AddFieldNameValue("WoDesc", WoDesc);
       createInstance.AddFieldNameValue("OriginatorId", OriginatorID);
       createInstance.AddFieldNameValue("WoType", "FL");
       createInstance.AddFieldNameValue("MaintType", MaintType);
       createInstance.AddFieldNameValue("WorkGroup", WorkGroup);
       createInstance.AddFieldNameValue("EquipNo", EquipNo);
       createInstance.AddFieldNameValue("WoPrefix", "FL");
       createInstance.AddFieldNameValue("JobCode4", JobCodeX4);
       createInstance.AddFieldNameValue("JobCode6", JobCodeX6);
       createInstance.AddFieldNameValue("AccountCode", accountCode);
       createInstance.AddFieldNameValue("PlanStrDate", planStartDate);
       createInstance.AddFieldNameValue("ReqByDate", planStartDate);
        if (!string.IsNullOrEmpty(componentCode))
        {
           createInstance.AddFieldNameValue("CompCode", componentCode);
        }

         #region currentVehicleMileage
         if (!string.IsNullOrEmpty(globalVariables.currentVehicleMileage))
         {
          if (globalVariables.useMileage)
          {
               createInstance.AddFieldNameValue("OrigDocType", "VM");
               createInstance.AddFieldNameValue("OrigDocNo", globalVariables.currentVehicleMileage);
           }
          }
         #endregion

         createReply = createBlock.Send(true);
         globalVariables.returnedWorkOrder = Convert.ToString(createReply.Requests.Item(1).Instances.Item(1).Fields.Item("WorkOrder").Value);

          mimsServer.Blocks.Remove(createBlock);

          return true;
          }
          catch
          {
             MIMSX.MIMSError error;
             error = mimsServer.Errors.Item(new Decimal(1));
             globalVariables.gvWOError = error.ErrorMessage;

             return false;
           }
        }

Then to create the work order, I have the following:

if (wo.createDriveUpWO(woDesc, globalVariables.loginUserEmpNo, woType, "35", compCode, equipNo, vehicleNo, workGroup, maintType, workDescriptor, planStartDate))
{
    error = null;
    globalVariables.gvWOError = "";
    proceed = true;
}
else
{
    error = "Error Creating Work Order for Equipment #" + equipNo;
    MessageBox.Show(error, "Work Order Creation Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
    proceed = false;
}

I hope this helped you.